Phthalocyanine green
Composition and Properties of Phthalocyanine Green
Phthalocyanine green is a modern synthetic organic pigment with the following formula:The pigment is unaffected by heat and chemicals and is extremely lightfast.
Names of Phthalocyanine Green
Heliogen green, Phthalo greenPG 7, CI 74260Phthalic is a shortening of the word naphthalic from oriental naphtha = oil, -cyanine from Greek kuanos = dark blue.
Preparation of Phthalocyanine
The pigment is prepared by a reaction of the pigment phthalocyanine blue with aluminum chloride. This reaction causes a substitution of hydrogen atoms for chlorine atoms at the aromatic nuclei.
History of Use
The commercial production of the pigment started in 1938 and the pigment has been used in many areas besides artists’ pigments. Jackson Pollock and Francis Bacon were fond of using Phthalocyanine green among other artists.Examples of use
